Kind of weird, as I also used Google (which I trust more than internal search engines) and didn't notice a result for MobyGames. But I didn't look through all of them of course.
What is more strange that MobyGames does not bring up the suggestion when I type the
incomplete title in the address bar. By contrast, a Russian gaming website called Absolute Games, which uses the same format for game page addresses as MobyGames, will get you directly to the game most relevant page if an incomplete title is give in the address bar (e.g. typing <site address>/games/warcraft will bring you to
Warcraft: Orcs & Humans, /games/solar-winds gets you to
Solar Winds: The Escape etc.).